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通过理论计算确立了多功能介质-金属结构空芯光纤的结构参量,优化了液相镀膜法的有关条件,明确了具体制作参量。制作了以聚碳酸酯毛细管为基管的,高柔韧性的,可同时低损耗传输红外目标波长激光和可见导航光红外的空芯光纤。对光纤传输性能进行了测试。在2.94μm波长的Er∶YAG和0.63μm波长的红色半导体激光器的直线损耗分别为0.4 dB/m和3 dB/m。组装在医疗内窥镜中的柔性空芯光纤,在先端以0.9 cm半径135°角弯曲时,对Er∶YAG激光仍有近70%的传输效率;绿色导航光在内窥镜中的的损耗值为11 dB,绿色指示点在内窥镜的视窗中清晰可见。结果表明此种光纤在内窥镜的激光传输方面有重要的应用价值。
Through the theoretical calculation, the structural parameters of the multi-functional medium-metal hollow fiber core are established, the relevant conditions of the liquid phase coating method are optimized, and the specific fabrication parameters are clarified. Made of polycarbonate capillary tube-based, highly flexible, low loss at the same time the infrared target wavelength laser and visible light navigation hollow fiber hollow fiber. Fiber optic transmission performance was tested. The linear losses of the red semiconductor laser with Er:YAG and 0.63 μm wavelength at 2.94 μm wavelength are 0.4 dB / m and 3 dB / m, respectively. The flexible hollow-core optical fiber, assembled in the medical endoscope, still has nearly 70% transmission efficiency for the Er: YAG laser when the tip is bent at an angle of 0.9 ° with a 135 ° angle; the loss of green-navigating light in the endoscope The value is 11 dB and the green cue point is clearly visible in the endoscope’s window. The results show that this kind of optical fiber has important application value in laser transmission of endoscope.